JPH02216238A - Cover cloth for bed or the like - Google Patents

Abstract

PURPOSE:To obtain the title cloth forming reduced dust and having dust-proof action by specifying the quantity of air flow, the sum-up length of the filament contained in the unit volume and the flexing rate of the woven fabric which has been produced by weaving continuous filament yarns containing ultrafine filaments. CONSTITUTION:Continuous filament yarns containing ultrafine filament yarns of less than 1.2 de filament fineness are woven in high density to obtain a woven fabric with the flat surface in which the weft yarns are more flexed. The air permeability of the woven fabric is set to 0.2 to 10cc/cm<2>/sec at a pressure of 12.7mm, water column and 1 to 25cc/cm<2>/sec at 20mm water column, the surface extending factor of the yarn of larger flexing rate on the cloth surface is set to 1.10 or higher and the total filament length in the unit volume is made more than 4,000m.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a fabric for bedding covers that is hygienic and comfortable to wear.

[Prior Art] Conventionally, sheets, duvet covers, etc. have been used as covers for bedding, and because they are easy to wash, they have been widely used in general households.
It has been widely used in hospitals, hotels, etc. The first priority for conventional bedding covers is that they are easy to wash, and other important factors include good moisture absorption and comfort. For this reason, most conventional bedding covers used cotton fiber as the material.

On the other hand, the characteristics required for bedding have changed in recent years as lifestyles have changed. In other words, due to the increase in the number of asthmatic patients due to environmental pollution and the occurrence of dust mites due to the improvement in the environmental temperature of residences, there are demands for bedding that, unlike conventional bedding, does not generate cotton dust and is free from dust mites. It has become necessary to prevent dust mites from invading bedding and to prevent dust mites and their carcasses generated inside bedding from being exposed.

It is easy to think of using high-density fabrics to meet these required characteristics, but simply using high-density fabrics would require considerable high-density fabrics to block out the aforementioned dust mites and other dust. The fabric must be dense, which makes the texture of the fabric stiff, making it uncomfortable to wear, and making it difficult to completely block out dust. Furthermore, when a high-density fabric is used for a bedding cover, air tends to enter between the bedding, that is, the futon, and the cover, and the alignment with the futon becomes an important required characteristic.

[Purpose of the Invention] The purpose of the present invention is to propose a fabric for covers such as bedding that satisfies the above-mentioned required characteristics, and by using the fabric of the present invention, it is comfortable to wear and further, This makes it possible to realize bedding with high dustproof properties.

[Structure of the Invention] The present invention involves weaving long fiber yarns containing ultrafine fiber yarns having a single filament fineness of [2 de or less] at a high density, and applying a test pressure of 12.
7■ Aeration amount Pa in the water column (ec/cJ/5ee)
is in the range of 10≧Pa≧0.2, test pressure = 30I
II A woven fabric in which the air permeability Pb in the water column is in the range of 25≧Pb≧1, the woven fabric has a structure in which either the warp or the weft has a higher bending rate, and the yarns with significant bending are on the surface. A fabric for a cover such as bedding, characterized in that the wave 11 coefficient W is 1.10 or more, and the converted yarn length of the yarn contained in a unit volume of the fabric satisfies 4000 m or more.
The fabric of the present invention is a fabric in which yarns containing ultrafine long fiber yarns having a single filament fineness of 1.2 de or less are woven at high density. Preferable examples of the ultrafine long fiber yarn include synthetic fibers, such as polyamide, polyester, and composite fibers thereof. Furthermore, the single yarn de needs to be 1.2 de or less, preferably 0.5 de to 0.01 de.
It is less than or equal to de. As the fibers having a single yarn de of 0.5 de or less, known fibers such as sea-island type composite fibers, split type composite fibers, and ultrafine fibers produced by high speed spinning using super draw can be used. Further, the yarn used in the present invention needs to be a long fiber. Spun yarn using short fibers is not preferable because the fabric itself becomes a source of dust. In the present invention, the term "long fiber yarn" refers to filament yarn, which of course includes yarns that have been crimped or fluid-sprayed. Furthermore 1. It is desirable to use the long fiber yarn having a total denier of 80 de or less. The fabric of the present invention is woven with long fiber yarns containing the ultrafine fibers, and it is preferable that the ultrafine fibers contain at least 40% by weight or more based on the long fiber yarns.

In the fabric of the present invention, the long fiber yarn has a high density (for example, in the case of a plain weave, the sum of the cover factor of one warp and the cover factor of one weft is 1, expressed as a cover factor CF).
700 or more is preferable), but
Either the warp or the weft of the fabric has a greater curvature. That is, in the present invention, the curvature ratio refers to the width per 10 warps or wefts that make up the fabric [the length in the direction perpendicular to the 10 threads]: X (cm) and the width direction Length when the bends of the weft or warp yarns arranged parallel to are stretched out: Y (
cm) and the 100 minute ratio [100Y/X (%)]. In textiles, the warp or weft is bent due to floating or sinking due to tissue points, but the above Y is measured under a load (initial load specified by JIS) that only stretches the bend. In the present invention, it is important that the bending-heavy yarn has a surface width coefficient W of 1.10 or more on the surface of the fabric.

Here, the surface width coefficient W is defined as follows.

W-Wl /WO WO: Refers to the basic length of the fabric, for example, the length per 10 yarns, in the cross section of the fabric in the direction perpendicular to the yarns with the most bending.

Wl: refers to the sum of the widths (cIll) of the yarns with significant bending on the front and back sides of the fabric.

FIG. 1 is a cross-sectional diagram illustrating the surface wave 1] coefficient W,
In Fig. 1, WO indicates the standard length of the fabric, Al,...
A2. ... indicates the spread width of the yarn in the cross section of the yarn 1 with significant bending, and Wl, -A1+A2+... indicates Wl
seek. FIG. 2 is a diagram illustrating the surface of the fabric used in the present invention, and the yarns 1, which are subject to bending, are arranged so as to spread in the width direction on the fabric surface. The actual 54 measurement is determined using a microscopic photograph of the cross section of the fabric.

Furthermore, the woven fabric of the present invention needs to have a converted yarn length of 4000 m or more in terms of yarn contained in a unit volume.

However, the converted yarn length is determined as follows.

In other words, the weight of the sample fabric; 1 and the average thickness H (
cll) to the weight per unit volume of the fabric M (g/c
I13) is calculated. The weight M is divided into warp component M1 weft component M
Divide into 2 and find the converted yarn length of each.

Warp conversion yarn length L+: Ll -9000M1 /D
v (DW is the average single yarn de of the warp) Weft conversion yarn length L2 + L2-9000M2 /DP (
DF is the average single yarn of the weft (de) L (ffl) -L 1+ L 2 The fabric thus prepared has low air permeability, and the test pressure: 12.7 ■ Air permeability in the water column Pa (cc/ c.
4/5ee) is in the range of IO≧Pa≧0.2, test pressure: 30ma + ventilation amount Pb in water column is 25≧Pb
It is necessary to be in the range of ≧1.

The ventilation amount referred to herein is a value measured according to JIS 109B Frazier method. That is, measurements were taken using a tester model AP-500 manufactured by Daiei Kagaku Seisan Seisakusho Co., Ltd. and changing the test pressure as described above.

Incidentally, such a woven fabric can be obtained by weaving the above-mentioned threads at a high density, but for example, by weaving with high warp tension and finishing with high warp tension, weft It is possible to give the fabric a structure that bends more greatly. Furthermore, when composite fibers of polyester and nylon are used, a bending structure may be imparted by utilizing the shrinkability or crimp of the composite fiber structure to express the crimp on the fabric. Moreover, the high-density fabric is
If the surface is flattened by slight calendering, the value of the surface spreading coefficient can be brought within the range of the present invention.

[Action of the Invention] As described above, since the present invention is composed of long fiber yarns, the fabric itself generates little dust and has an excellent dust-proofing effect. That is, since the value of the air permeability is within the above-mentioned range and the converted yarn length of the yarn contained per unit volume is 4000 m or more, it exhibits an excellent filter effect. Moreover, not only is the air permeability value low, but also a moderate amount of air passes through when the air pressure is high, so air is less likely to be trapped between the futon and the cover.Furthermore, long fibers are included per unit volume. This increases the inter-fiber voids. Conventional fabrics that simply increase the density of the fabric only work to block the passage of air; however, fabrics that are made denser and further calendered increase the fiber density per unit volume and reduce the fiber voids. Reduce. Such fabrics do not allow air to escape between the futon and the cover and have little filtering effect. In the present invention, as mentioned above, by increasing the fiber voids included per unit volume and setting the surface expansion coefficient W within the above range, air passes through the gaps where the threads intersect, reducing the filter effect. This is to prevent it from happening. This makes it possible to prevent dust mites generated inside the bedding or the like and their dead bodies from coming out.

Furthermore, since the fabric of the present invention has a large curvature ratio of either the warp or the weft, the pressure between the warp and the weft is reduced, thereby increasing the drape property even though it is a high-density fabric. This improves the fit with the futon. FIG. 3 is a cross-sectional view schematically showing the contact pressure between yarns due to the bent structure of the yarns. As shown in FIG. 3(a), when any of the yarns takes on a structure with a large bend, the contact pressure between the yarns decreases. In the fabric of the present invention, since one of the yarns has a structure in which the yarn is highly bent (1 in FIG. 3(a) indicates a yarn with a large degree of bending), the contact pressure is reduced. On the other hand, in conventional high-density woven fabrics, as shown in Figure 3, high shrinkage yarns are used, so the yarns are linear in the woven fabric, and the contact pressure between the yarns is conversely large, resulting in poor drapability. Therefore, it is not possible to improve the alignment with the futon.

As described above, the present invention is a high-density woven fabric that has a specific range of ventilation and has a woven structure that is not found in conventional high-density woven fabrics, thereby adding drapability and filter function. .

In order to create a cover for bedding, etc. using the fabric of the present invention, the futon can be almost completely enclosed in an airtight system by making the opening and closing opening for putting in and taking out the futon into an airtight structure. It is possible to solve problems. In addition, the present invention has advantages such as preventing mites from entering from the outside because it is a high-density fabric using ultra-thin long fibers, and further preventing mites from breeding in the high-density fabric.

Note that bedding and the like include not only futons but also various cushions, cushions, blankets, and the like.

Examples will be explained below.

[Example 1] Polyester filament yarn (75de/7
:Hll), using filament fibers having the denivers shown in Table 1 as the wefts, and with warp cover factors and weft cover factors shown in Table 1, a plain woven fabric was woven. A conventional finishing process was used, but the warp tension was increased in the scouring and heat setting processes to form a fabric with a weft-aligned structure, and the surface of the fabric was lightly calendered for finishing.

For comparison, polyester filament yarn and textured yarn (7
A woven fabric was prepared in the same manner as in the example using 5de/36fil). The filter effect and drapability of each fabric were evaluated.

The results are also shown in Table 1.

[Example 2] Polyester filament yarn (30 de/1
2 f'll), and split type composite fiber (5 f'll) was used as the weft.
0 de/20 fil) Fabrics with flat weave were woven with changes as shown in N015 and N016 in Table 1, respectively.

After scouring the fabric, apply the dividing agent Tetrosin OEN 30L.
After dividing using [Yamakawa Pharmaceutical Co., Ltd.], drying,
Fabrics were created through heat-setting, dyeing, and calendering steps, and the filter effect and drebous properties of the fabrics were evaluated. The evaluation results are also shown in Table 1. In the case of fabrics with low fabric density, the air permeability did not satisfy the value of the present invention, and furthermore, the filter effect could not be satisfied.

In Table 1, for No. 1, No. 1, and No. 12, both the filter effect and drapability were good, and the object of the present invention could be achieved, but for No. 1, No. 4, the single yarn denier was within the range of the present invention. The filter effect was poor because the fabric was removed from the fabric, and the drapability, which is a substitute characteristic that shows how it fits along with the futon, was also poor, making it impossible to achieve the object of the present invention. In addition, the sample No. 5 had good filter effect and drapability, and was able to achieve the object of the present invention.

The filter effect of N096 was poor and the effect of the present invention could not be obtained.

[Hereinafter, blank space] In the present invention, the values of cover factor, filter effect, and drapability are defined as follows.

a. Cover factor In the present invention, the cover factor CF is determined by the formula: CF-density (books/inch) x 4 stations] "〒-===π.

b. Filter effect In the present invention, the filter effect is expressed as IES-R.
It was carried out according to method P-3-001-1985. That is, air adjusted so that the dust concentration α is in the range of 30,000 ± 3,000 particles/7χ is applied to the test fabric (
permeate the sample) at a suction rate of 5 liters/min,
The permeated air is stored in a trap, the dust in the trap is determined as the permeated dust concentration β, and the dust trapping efficiency is calculated using the following formula.

Dust capture efficiency (%) - (1 - β / α) x 100 The dust concentrations α and β are measured using a particle counter (KC-11 manufactured by Rion Co., Ltd.).
).

C2 drapability As shown in Figure 4, the inner diameter of the ring is 1 oc.
A sample cut into a circle with a size of lI was cut at 30 cm/mi.
The sample is pulled through approximately the center at a speed of n, the resistance force applied to the center is measured with a load cell, and this value is determined as the drape coefficient. In FIG. 4, 1 is a sample, 2 is a ring, and 3 is a load cell.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view explaining the surface expansion +j1 coefficient W, FIG. 2 is a surface view explaining the surface of the fabric used in the present invention, and FIG.
The figure is a cross-sectional view showing the condition between the threads due to the bending structure of the threads.
The figure is a perspective view showing a method of measuring drape coefficient. Figure Figure Figure

Claims (2)

[Claims] (1) High-density weaving of long fiber yarns containing ultrafine fibers with a single filament fineness of 1.2 de or less, test pressure: 12.7 mm
The fabric has an air permeability Pa (cc/cm^2/sec) in the water column in the range of 10≧Pa≧0.2, a test pressure: 30 mm, and an air permeability Pb in the water column in the range 25≧Pb≧1, , the woven fabric has a structure in which either the warp or the weft has a higher curvature, the yarn with the larger curvature has a surface width coefficient W of 1.10 or more, and the unit of the woven fabric A fabric for a cover such as bedding, characterized in that the converted yarn length L of the yarn contained in the volume satisfies 4000 m or more. (2) The fabric according to claim 1, wherein ultrafine fibers of 0.5 de to 0.01 de are used for the weft.